Key plug



FIG. 1 is a perspective view of a key plug showing mu new design;

FIG. 2 is a front elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a right side elevation thereof, the left side elevation being a mirror image thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The CRP indicia shown in broken lines are for illustrative purpose only and form no part of the claimed design. 

CLAIM I claim the ornamental design for a key plug, as shown and described. 